And robert ix ucintosh



May 19, 1911s.'v y R. 16,071

Y P. DORSEY ET AL PRES SURE RELI EF VALVE original Filed-Aug.` 27, -1920 50 let pipe Reissued May 1 9, 1925.

reissue Med Kirch 27,

To all whom 'it may concern:- c

Be it known that we, PARMER DoRsEY and ROBERT D. MoIN'rosm citizens of the United States, and residents, res ectivel of 5 Wichita in the' county of edgwic and State 'of Kansas, and of River Forest, in` the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pressure-Relief Valves, of which the following is exact specification. Ourv invention is concerned with pressure' valves, and more especially with safety valves in which the valve is opened autoj limatically and the pressure 'released in case it passes a certain point, and it is.concerned primarily with such a valve-having also a manual release for thesprin pressure', so that every timel it is operate manually to relieve the spring pressure the'safetyvalve will be Aunseated, 4thereby insurig that it will not be stuck if it is ever call upon to function as a safety valves l e y v O ur invention s further concernedwith y a pressure release -valve 'whether operated manually. or automaticall ywhich* the diaphragm 'itself is. shape so as to have a spring action that'causes it to operate sudv denly and open the valve widely as soon asthe dangerous pressureis reached, or the manual operation has reached the open p'osi-- sud enly, instead of slowly. I l

l -Ou'r invention is further :concerned'with a'l 35 Vpressure release valve, 'whether o ratedmanually or autoxnatically, in which 'the-` `r:'diaphrag'gm ,itself is shaped so as'to have a' spring l actien that causes it to hold 'the -valve tightly against its seat`whenthe dia- 40 phragm is -in 'its' valve-closing position.A

O'ur invention is further concerned witha pressure valve in which the valve seat is so located and held in the valve casing that l it canbe removed simply byv screwing out. a plug in which it is supported. l

' Our'inventiori'is further concerned with a valve ofthe class describedA in which-one I of the pipeA openings is rotatably mounted relative to the other so that the inlet or outcan be set at any desired anglev to the other without the use of any elbows 1 0-1. Tas. v

vt e pressure to fall rapidly.

a full, clear, e and tion(i so,thatl :it will vrelease the'. pressurer Re.v 16,0711* UNITED STATES PATENT oFF-lcs.'

PARKER DOBSEY, OF WICHITA, KANSAS, AND ROBERT D. HoINTOSH, OF BIVB' FOB- FST, ILLINOIS, ASSIGNOBS TO THE IMPERIAL BIB-ASS MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS. v

PRESSURE-RELIEF VALVE.

1925. Serial' No. 18,926.

l O'ur inventionv is furtherl concerned-with a manually operated valve having a vdiafphragm with a spring action. associatedl therewith so that when the pressure is rel` moved from one 4side of the diaphragm the action thereof will open the` valve sp1-in uic y to, its Awide open position tofallow lOur invention is finally w ene-ver the valve is openedit is positive-f.

,sibility of its sticking.

f To illustrate our invention,l we have an origina; No. 1,493,7'14, dans my 1s, 1924, semi no. 406,501, mea ungut a7, iaa'o. Appuomnarer concerned with -Y a ress ure release valve so constructed that.

nexed hereto la sheet of drawings, in which' the same ,reference characters are used to so that the pressure is released;y and ferred form', `we employ a--valve casing -con- -designate identical parts all lthe {iguraA Figi-1'- isv av central longitudinal Section.; i .through the valve with the :handle turned sisting of two halves 11 and 12, eachvhalf l being .circular \in cross-section throughout most of its length and the twocastings having their ad'acent entlshollowed out to;

form' a cham r on'eachsi'deifof the diaphr'f'm lannu ar ilange;14 -carried-bythe .portion 12 'of' the' casing and-fthe annular flange 15 13, which. isfclamped'between theA- carried by' the other' portion and -preferably overhanging lthe same fas shown, the twod halves I bein Y vclamped together .with the periphery o the diaphragml andthe an. nular gasket 16 l. being 'clampedv between `bry the screwsj 17.1j Thefcasin 12' is. #provided Withthe internally-three. ed`in-jv4 let '18, preferably extending` radially therefl from, and locate -concentrically 'n the casthem ing is the annular seat orflange 19,`on` which is adjusted in any desiredposition the, outv let sleevei120` which has Athe vthreaded outlet l aperture j 21 on one j side fthereof, which aperture n 'be directed ,atvv any desired" angle to the inlet '18g-l5'-simfply turning? the.: sleeve on" itss'eatgY-.whererit 1s securedff-.bythe lock. "nut'22A-c'o4operating withmithe threads 123 on '-thecuter end Vof the' 'hollow is screwed into the outlet passage formed in the casing 12, and which is preferably seated against the small annular flange 25 formed yat theend of the passage 24.

An annular channel 26 is formed in the inner'end vof the plug and has seated therein the annular rubber valve seat-27. The hollow cylindrical plug has the openings 28 in its sides so that the gas can pass out through port 21 in any position of the plug, which Ahas its outer end .formed with vthe six flat surfaces 29, so that a wrench can be applied thereto. The inner face of the chamber in the casing 12 has formed thereon the four projections 30 which serye to guide the `valve 31 to its sea-t 27, this valve preferably taking the form of a sharp flange on the edge of a disk secured on the valve stem 32, which `is threaded into the center fgthe disk 33, a reduced central portion of which extends through thecentral opening in the diaphragm 13 to which it is secured by the lock nut 34 (zo-operating with the metallic washer 35, which in turn engages theA packing ring 36 clamped against the vdiaphragm 13. The disk 33 has the large flange 37 with its face next to the diaphragm convex, as shown, so that when it is forced toward the valve seat, the diaphragm will be compelled to assume the position shown in dotted lines in Fig. 1, in which position, the diaphragm Ihas been sprung past the central position by bending the same slight` ly at the annularoffset38, which-is pro vided in the'diaphragm for this purpose l-Vitli this construction of the diaphragm, it tends to remain either in the full-.line or the dotted-line positions shown in F ig, 1.

For Ithe purpose ,of appl ing pressure tu the outer face ofthe diap ragm, i. e., the one in the portion 11 of the casing, we pref erably employ the helically-coiled expand ing spring 39 which is interposed between the flange disk 40 secured on the end of the yrod 41 and the washer 412 loosely mount-- ed on the rod, but heldin any desired posi tion of adjustment by'meansA of the hollow adjusting bolt 43 which has an end to which a wrench can be. applied and' which is screwed through the internally and exteitnally threaded reduced portion 45 of the cylindrical extension 46 of the portion 11 of the casing. By adjusting the bolt 43 to any desired position, it will be obvious that the tension of the spring 39 may be increased or diminished to furnish any desired pressure on the diaphragm 13.

The mechanism thus far described furnishesa safety release valve, but in order that the same may be released manually, we preferably provide the following mechanism: Threaded on the outer end of the rod 4l is a n ut 47 held in place by a lock nut-'18, the nut et? forn'iing an abutment against which the hub 49 of the handle 5?? operates. The handle 50 has on the face of the hub a pair of diagonally opposed lugs 51 which are preferably substantially semicircular in cross-section, and Which are adapted to co-operate with the pair of diametrically opposed semi-circular recesses 52 formed in the end of the cap 53 which is screwed on to the extension 45 and is held against turning thereon by the lock nut 54. Also provided on the face of the cap 53 is a pair ofv diametrically-opposed shallow .recesses 55,which co-operate with the lugs 51 when the Valve is turned to its open position to hold it in said position against accidental displacement. Alock nut 56 `on the threaded stem 32 locks the valve 31 in its adjustment relative to the diaphragm 13.

The operation of the foregoing valve will be readily apparent. Assuming that the parts are in the position shown -in dotted lines in Fig. 1, and that the pressure of the gas reaches the danger point, this pressure will lift the valve 31 against the pressure of the spring 39 withoutentirely freeing it from its seat until the diaphragm 13 has beenmoved past its center, at vwhich time the spring action of the diaphragm serves to move it suddenly clear of the seat 27 and allows the valve to open Wide and the gas to be release-d rapidly, instead of sizzling in the manner in which the ordinary relief valve operates. lVhe-n the handle is turned to the full-line position shown in the drawings, the flange 4() is drawn away from the disk 33 quicklygand the pressure of the gas, now unopposed, moves the diaphragm from the dotted-line position shown until it passes the center, after which the spring of theV diaphragm throws it quickly to the fullline position, opening the valve widely and securing` a Very quick release of the pressure.

lVhile we have shown and described our invention as embodied inthe form which we at present consider best adapted to carry outits purposes, it will be understood that it is capable of some modifications, and that we do not desire to belimited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

What we claim as new, and desire to secure by Letters Patent of the United States, 1s:

1. In a pressure operated release valve, the combination with a casing, of an elastic diaphragm covering a chamber in said casing, an inlet to said chamber, an outlet for the chamber associated with said casing, a valve seat in said outlet, a valve co-operating with the seat and connected te the diaphragm, a. spring for applying pressure to the oiiitside of the diaphragm, ine-ans for adjusting the tension of the spring, and a handle for drawing the spring from contact with the diaphragm so that the valve can open automatically by theelasticity of the diaphragm.

2. In a pressure operated release valve, the' combination with `a casing, of an elastic diaphragm coverin a chamber in said casing, an inlet to sai chamber, an outlet for the chamber associated with said casing, a valve seat in said outlet, a valve co-operatin with the seat and connected to the diap ragm, al spring for applying pressure to the outside of the diaphragm, means for adjusting the tension of the spring, a handle for drawing the spring from contact with the diaphragm so that the Valve can o en automatically by the elasticity of the iaphragm, and detent mechanism for holding the handle in its closed position.

3. In a pressure operated release valve, the combination with a casing, of an elastic diaphragm ooverin a chamberin said casing, an inlet to sai chamber, anoutlet for the chamber associated With said casing, a valve seat in said Outlet, a valve co-operating with. the seat and v connected to the diaphragm, means for applying pressure to the outside of the diaphragm without being positively connected thereto, and a handle for withdrawing said pressure'so that the valve can open automatically by the elasticity of the diaphragm.

4. In a pressure operated release valve,'the combination with a casing, of a diaphragm covering a chamber in said casing, an inlet to said chamber, an outlet for the chamber associated with said casing', a Valve seat in said outlet, a Valve co-operating with the seat and connected to the diaphragm, a rod having an enlarged end engaging the center of the diaphragm, a helically-coiled expanding spring surrounding the rod, a washer engaging the other end of the spring, a. cover cap screwed over the outer end of the bolt, said cap having a cam recess therein, and a handle loose on the end of the rod between the cap and anabutment on the Y outer end of the rofl, and having a lug cooperatingwith the recess.

5. In a valve of the class described, the combination with a two-part casing with an interposed diaphragm dividing it into two chambers, one part having aV cylindrical extension concentric with the diaphra and the other having radially-arranged 1nlet and outlet ports, of a valve carried by the diaphragm, a seat for the valve carried by a member screwed into the outlet port of the casing, a helically-coiled expanding spring in the extension, means for regulating the tension of the spring and its position relative tol the diaphragm, a rod extending through the spring and having an enlarged head with which the inner end of the spring engages, and means for pulling out the rod.

6. In a Valve of the class described, the combination with a two-part casing with an interposed diaphragm dividing itv into two chambers, one part having Va cylindrical ex` tension concentric with the diaphragm and the other havin radially-arranged inlet and outlet ports, o a valve carried by the diaphragm, a seat for the valve carried by a member screwed into the outlet port ofthe casing, a helically-coiled expanding spring in the extension, means for regulating the tension of the spring and its position relative to the diaphragm, a rod extending through the spring and having an enlarged head with which the inner end of the spring engages, and means for pulling out the rod,

consist-ing of an abutment on its outer end,

a handle on th'e rod between the abutment and the casing, and cam mechanism between the handle and the casing to pull out the rod when the handle is turned.

7. In a pressure operated release valve, the combination with a casing, of a diaphragm covering a chamber in said casing, an inlet to said chamber, an out-let for the chamber associated with said casing, a valve seat in said outlet, a valve co-operating with the seat and rigidly connected tothe center of the diaphragm so as to move the same.

distance as said center, and means `for ap' plying any desired pressure to the outside of the diaphragm, said diaphragm being adapted to move suddenly from the position in which the valve is seated to one in which it is fully. unseated.

8. In a pressure operated release valve, the combination with a casing, of a diaphragm covering a chamber in said casing, an inlet to said chamber, an outlet for the chamber associated with said casing, a valve seat in said outlet, a valve co-opera-ting with the seat and connected to the diaphragm, and means for applying any desire-d pressure to the outside of the diaphragm, said diaphragm being shaped so that .its center to which-the valve 'is attached moves suddenly from the position in which the valve is seated to one in which it is fully unseated. 9. In a pressure operated release valve, the combination with a casing, of a spring metal dia-phragm covering a chamber in said casing, an inlet to said chamber, an outlet for the chamber associated with said casing, a valve seat in said outlet, a valvev co-operating with the seat and connected to the diaphragm, and means for applying pressure'to the outside of the `dia-phragm,

`said diaphragm being concaved and provided with an annular offset that causes the center of the diaphragm to tend to be held by the inherent resiliency of the diaphragm in position either to close the valve completely or hold it wide open, for the pur- 1 pose described.

10. In a pressure, operated release valve, the combination with a casing, of a diaphragm covering a chamber in said casing, an inlet to said chamber, an outlet for the a chamber associated with said casing, a hollow lug screwed into the casing having openings in the side thereof, a valve sea-t carried by the inner end of the plug, a

valve connected to the diaphragm cooperat- 1 0 ing with said seat, means for applying pressure to the outside of the diaphra m, an outlet sleeve `concentric with the pug, and a nut co-operating with Vthe threaded outer end of the plug to' hold the outlet sleeve se- LT cured in'any desired angular position;

411. -In .-apressure operated release valve, the combination'with a casing, of a diaphragmfcoveri'ng a chamber in said casing, aninlet to said chamber, a boss surrounding an outlet opening in the casing, a sleeve with aI threaded aperture therein'axially adjustable on said boss, means forrigidly securing the sleeve, in any desired angular position, a valve seat in said outlet operable in any adjustment of the sleeve, a valve c0- operatin with the seat and connected to the diap ra and means for applying preure to t e outside of the diaphragm.

12. In a pressure operated release valve,

the combination'with" a casing, of a diaphra m covering'a chamber in said casing, an in et to said chamber, a .boss suirounding an outlet opening in the casing, a sleeve With a threaded aperture therein axially adjustable on said boss, a threaded member extending from the casing concentrically with the sleeve, a Anut screwed on to the threaded member to engage the outer end of theslee'veand secure it rigidly in any adl `4.o justment, a valve seat in said outlet, a valve 'co-operating with the seat and connected .to the diaphragm, and means for applying preure to the outside'of. the diaphragm.

13. In a pressure operated release valve,

a5 the combination with a casing, of a diaphra covering a chamber in said casing, an in et to said chamber, a plug screwed .into the casing, a valve seat carried bythe inner end of the plug, a valve connected to 5 0 the diaphragm co-operating with said seat,

means or applying ressure to'the outside of the diaphragm, a ss on the casing surrounding the plug, asleeve with a threaded `aperture therein rotatably mounted on said boss, and a nut screwed on to the threaded end of the sleeve to engage the outer 'end of the sleeve.

14. In avalve of the class described, the combination with a two-partl casing with an 00 interposed diaphragm dividing it into two chambers, one part having acylindrical extensionconcentric with the diaphragm and the other having inlet and outlet ports, of a valve carried by the diaphragm, a seat for' coiled expanding spring in the extension,

means for regulating theV tension of thespring, -and means for compressing the spring to remove the pressure from the diaphragm. 1

15. In a valve of the class described, the combination with a two-part casing with `an interposed diaphragm dividing it into two chambers, one part having a cylindrical eX- tension concentric with the diaphragm Aandl the other having inlet and outlet ports, of a valve carried by the diaphragm, a seat for the valve carried by a member screwed into the outlet port Aof, the casing',.a lielicallycoiled expanding vspring in the extension, means for regulating the tension of the spring, a rod extending through the sprin and having an enlarged head with wliicthe inner end of the spring engages, andl means for pulling out the rod, consisting of an abutment on its outer end, a handle fulcrumed on the rod between the abutment and the casing, and cam mechanism between the handle and the abut-ment to pull out the rod when the handle is turned.

16. In a pressure operated release valve, the combination with a casing, of a diupliragm covering a chamber in said casing,

tions being such as to permit the extended,

adjustment of the valve relative to the diaphragm and its seat but preventing acci- .dental turning of the valve While in use to alter the adjustment.' A

17. In a pressure operated release valve, the combination ywith a casing, of a resilient 'diaphragm covering a. chamber in said casing, an inlet to said chamber, an outlet for .the chamber associated with said casing, 'aV -valve seat in said outlet, a valve co-operating with the seat and connected to the diap irag'm, and means for apply in any desired pressure. to the outside,v o vthe diaphragm, said diaphragmbeing so -shaped andthe valve so located relatively there-to that when the diaphragm is in its valve closing position it holds the valve tightly against its seat by its inherent resiliency. FARMER DORSEY.

ROBERT D. -MGINTOSIL ioo l ios 

